C01B 17/66
Dithionites or hydrosulfites
Official title: Dithionites {or hydrosulfites (S2O42-)}
C01B17/66 (Dithionites or hydrosulfites) appears on 55 US grants and 7 published applications in this corpus.
Search patents in C01B- Granted patents
- 55
- Published applications
- 7
- Assignees
- 23
- Inventors
- 83
- Latest grant
- 27 Dec 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Process for removal of selenium from water by dithionite ions27 Dec 2022US 11,535,537 B2Ecolab USA Inc.
- Process and system for producing sodium hydrosulfite crystals18 Oct 2022US 11,472,704 B2Silox Canada Inc.
- Stabilization of sodium dithionite by means of various additives1 Dec 2020US 10,850,982 B2BASF SE
- Method for preparing dithionite9 Aug 2011US 7,993,622 B2Kemira Oyj
- Method for producing sodium dithionite28 Jun 2011US 7,968,076 B2BASF SE
- Process and system for producing sodium hydrosulfite crystals12 May 2022US 2022/0144635 A1Hydro Technologies (Canada) Inc.
- Process for the Stabilisation of Hydrosulphite23 Sep 2021US 2021/0292167 A1ESSECO S.r.l.
- Stabilization of sodium dithionite by means of various additives17 May 2018US 2018/0134557 A1BASF SE
- Process for removal of selenium from water by dithionite ions7 Dec 2017US 2017/0349462 A1Ecolab USA Inc.
- Bleaching method25 Aug 2011US 2011/0203485 A1Kemira Oyj
Most cited
By later US patents
- Photoelectrochemical device containing a quantum confined group IV semiconductor nanoparticle133US 6,361,660 B12002
- Method of preparing lithium salts41US 6,555,078 B1FMC Corporation · 2003
- High purity lithium salts and lithium salt solutions40US 6,017,500 AFMC Corporation · 2000
- Photoelectrochemical device containing a quantum confined silicon particle31US 6,060,026 AStarfire Electronic Development & Mktg., Ltd. · 2000
- Method of removing sodium thiosulfate from a hydrosulfite reaction mixture17US 3,961,034 AVirginia Chemicals Inc. · 1976